An abdominal aortic aneurysm (AAA) is a bulge that occurs in the aorta, the large blood vessel that carries blood from the heart to the lower body. This condition typically develops in the section of the aorta that runs through the abdomen. If the aneurysm grows too large, it can rupture, leading to severe internal bleeding, which can be life-threatening. Risk factors for developing an AAA include smoking, high blood pressure, and a family history of the condition. Regular screening is recommended for individuals at higher risk, especially men over 65 years old, to detect any aneurysms early and manage them effectively.